Automatic gate



A. BALTZER AUTOMATI C GATE Dec. 22, 1931.

4 Sheets-Sheet 1 Filed Jan. 1'7, 1931 I fad/120.7 fiefizez;

INVENTOR ATTOR NEY NHLF Lg/2 kw as Dec. 22,- 1931. A. BALTZER 1,837,941

AUTOMATIC GATE Filed Jan. 17, 1931 4 Sheets-Sheet 2 Q3 qw INVENTORATTORNEY 4 Sheets-Sheet A. BALTZER AUTOMATIC GATE Filed Jan. 17. 1951Dec. 22, 1931.

Dec. 22, 1931. A. BALTZER 1,837,941

AUTOMATIC GATE Filed Jan. 17, 1931 4 Sheets-Sheet 4 INVENTOR ATTORNEYPatented Dec. 22, 1931 UNETED STATES PATENT OFFICE AUTOMATIC GATEApplication filed January 17, 1931.

This invention relates to gates and has particular reference toautomatically operated gates, whereby the weight of a vehicle willoperate mechanism to open the gate and permit the vehicle anunobstructed passage.

An object of the invention is the provision of a gate of novelconstruction which is normally arranged in vertical position to providean obstruction to vehicular passage, but

go when moved to a lowered or open position,

will permit of the passage of vehicles.

Another object of the invention is the provision of novel means forcontrolling the 7 operation of the gate, together with releas- 5 ablemeans to hold the gate against operation until the operating mechanismis actuated.

With the above and other objects in view, the invention further includesthe following novel features and details of construction, to behereinafter more fully described, illustrated in the accompanyingdrawings and pointed out in the appended claim.

In the drawings I Figure 1 is a plan view of the invention showing thegate in closed position.

Figure 2 is a like view with the gate open.

Figure 3 is a sectional view on the line 33 of Figure 1.

Figure 4 is a like view on the line 4l4 of Figure 2.

Figure 5 is a transverse sectional view taken substantially on the line5-5 of Figure 1.

3.3 Figure 6 is a sectional view on the line 6-6 of Figure 2.

Figure 7 is a fragmentary bottom plan View showing one corner of theplatform.

Figure 8 is a fragmentary elevation on an 4. enlarged scale showing oneend of the gate.

Figure 9 is a top plan View of the same. Figure 10 is a fragmentary planview of one end of one of the depressible tread members and the adjacentportion of the platform.

Figure 11 is a section on the line 1111 of Figure 10.

Referring to the drawings in detail wherein like characters of referencedenote corre- W sponding parts, the reference character 15 Serial No.509,478.

indicates a platform which is arranged on substantially the same levelas the level of the roadway 16. This platform is enclosed within acasing which includes parallel side walls 17 and end walls 18.

The platform is provided with longitudinally extending parallel slots19. These slots are disposed longitudinally of the roadway 16 andaccommodate normally flush depressible tread members 20. Hingedlysecured to the'ends of the tread members 20 as shown at 21, are plates22, and these plates extend through openings 23 provided in the ends 18of the housing. Vhen the tread members 20 are in their normally elevatedposition as shown in Figure 3 of the drawings, the plates 22 will extendhorizontally outward so as to provide for the passage of Vehicle wheelsfrom the roadway on the adj acent ends of the tread members. WVhen thetread members are depressed as shown in Figure 4 of the drawings, theseplates 22 will incline upwardly so that the wheels of the vehicle maypass upward from the tread members to the surface of the roadway.

Rising from the sides 17 of the housing are posts 24 and the spacebetween these posts is bridged by a gate 25. This gate is normallyelevated to obstruct passage between the posts and for this purpose itslower edge is pivotso ally mounted in bearings 26.

The gate 25 preferably includes a frame formed of upper and lowerparallel bars 27 and end connecting bars 28, the lower bar 27 extendingthrough the bearings 26 for the pivotal mounting of the gate. The gatefurther includes an intermediate section or panel 29 and end sections orpanels 30. These end sections or panels 30 are connected to the sectionor panel 29 by means of offset sections formed in the bars 27 and 28 andindicated at 31. These olfset sections 31 are arranged directly abovethe tread members 20 and when the gate is in its raised or closedposition, these offset portions 31 will extend horizontally outward.However, when the tread members are depressed and the gate 25 islikewise depressed, these offset portions or sections 31 will extenddownward into the openings 19 of the platform as shown in Figures f and6 of the drawings and provide a passage for the wheels of a vehicle.

Mounted in bearings 32 arranged transversely below the platform is arock shaft 33. This shaft is provided with spaced offset portions 34,defining crank arms which are pivotally secured to the under sides ofthe tread members 20 as shown at 35. The outer ends of the rock shafts33 have crank arms 36 extending therefrom.

Extending from opposite ends of the low-' er bar 27 of the gate arecrank arms 37. These arms have pivotally connected thereto the innerends of connecting rods 38, while the outer ends of these rods arepivotally connected to the crank arms 36 of the rock shafts 33. Downwardmovement of the tread members 20 will, through the rod and armconnections just described, move the gate pivotally downward from theposition shown in Figure 3 to the position shown in Figure a, so that avehicle supported by the tread members 20 may pass over the gate, thewheels passing through the offset portions 31. Springs 39 which connectcertain of the rods 38 with the side members 17 of the housing, act toyieldingly hold the gate and treads in normally raised position.

Pivot-ally mounted upon one of the posts 24 in a bearing 40, is a shaft41. This shaft has extending from one end an arm 42. A link 43 has oneof its ends pivotally secured to the outer end of the arm 42 and itsother end pivotally secured to the arm 37' at the point ofpivotalconnection of the latter with the rods 38. Thus, movement of the treadmembers 20 will rock the shaft 41 pivotally. The opposite end of theshaft carries a latch 44 whose end engages the upper bar 27 of the gatewhen the latter is in its raised or closed position, so that pressureupon the gate will prevent its being forced downward until this latch44: is released. However, when the tread members 20 are depressed, theshaft ll will be moved pivotally as previously described, so that thelatch 44 will swing upward and release the gate and permit the same tobe moved to its lowered or open position.

The invention is susceptible of various changes in its form, proportionsand minor details of construction and the right is herein reserved tomake such changes as properly fall within the scope of the appendedclaim.

Having described the invention what is claimed is In a gate, a platformhaving spaced paral lel openings therein adapted to be disposedlongitudinally of a roadway, yieldingly mounted tread memberslocatedwithin the openings and normally disposed flush with the surface of theplatform, a normally vertical gate arranged transversely of the treadmembers, means to pivotally mount the lower edge of the gate, wherebythe latter may be swung downward to a horizontal position, meansincluded in the ate structure for passage through the plat orm openingsto provide for the passage of the wheels of a vehicle, a rock shaftmounted transversely beneath the treads, spaced crank arms extendingfrom said shafts and pivotally secured to the treads, crank arms at theends of the rock shafts, crank arms extending from opposite ends of thegate, and rods connecting the last mentioned crank arms with the crankarms at the ends of the crank shafts to swing the gate downward when thetreads are depressed.

In testimony whereof I ailix my signature.

ANDREAS BALTZER.

